Malicious Code - CompTIA Security+ SY0-701 - 2.4
Understanding Malicious Code and Network Security
Overview of Attack Methods
- Attackers can exploit various methods to gain access to systems, including social engineering, default credentials, and misconfigurations.
- Social engineering tricks users into revealing sensitive information, while default credentials and misconfigurations are often user errors that do not require advanced technical skills.
The Role of Malicious Code
- When basic security measures fail (e.g., users are aware of social engineering), attackers may resort to using malicious code for system access.
- Malicious code encompasses a variety of techniques such as executables, scripts, macro viruses, and Trojan horses.
Defense Mechanisms Against Malicious Code
- A robust defense strategy includes anti-malware tools to block harmful executables and scripts.
- Firewalls help prevent known malicious traffic; continuous updates and patches address vulnerabilities in the system.
- User training is essential for promoting secure computing habits to avoid falling victim to phishing or other deceptive tactics.
Case Studies of Malicious Code Attacks
- The WannaCry ransomware attack exploited a vulnerability in Windows systems via SMB version 1, allowing arbitrary code execution on user machines.
- British Airways suffered from a cross-site scripting attack where attackers inserted malicious JavaScript on checkout pages, potentially compromising credit card information for around 380,000 victims.